I let the search continue a little bit. For Stockfish I think the main line after Deep Junior's B sac is still a draw. White about 1½ pawn up but this advantage isn't growing anymore. Of course it is possible that Stockfish misses something. I would like to test the small change to Stock but I can't use the repo anymore because it is on a Windows XP machine, which is no longer supported. It helps a tiny bit with Zugzwang and the Mate in 5. Maybe I can open a new repository but I think I would need a new account?
[d]rnbqr1k1/pp3ppp/2p2n2/3p4/3P4/P1NBP3/1PQ1NPPb/R1B2RK1 w - -
Engine: Stockfish with small change (512 MB)
Code: Select all
48/87 38:31 +1.51 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (3.439.099.092) 1488
49/89 52:34 +1.61++ 11.Kxh2 (4.727.839.060) 1498
49/89 54:48 +1.40-- 11.Kxh2 Ng4+ (4.931.981.905) 1499
49/89 54:58 +1.56++ 11.Kxh2 (4.947.329.112) 1499
49/89 55:35 +1.61 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (5.002.453.787) 1499
50/89 67:22 +1.50-- 11.Kxh2 Ng4+ (6.068.373.495) 1500
50/89 72:52 +1.39-- 11.Kxh2 Ng4+ (6.574.211.040) 1503
50/89 73:15 +1.50++ 11.Kxh2 (6.607.349.081) 1503
50/89 75:03 +1.45 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (6.767.767.089) 1502
51/75 80:21 +1.34-- 11.Kxh2 Ng4+ (7.237.503.722) 1501
51/83 80:46 +1.45++ 11.Kxh2 (7.274.492.566) 1501
51/88 81:58 +1.60++ 11.Kxh2 (7.381.185.057) 1500
51/88 88:21 +1.67 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (7.966.099.510) 1502
52/90 90:21 +1.56-- 11.Kxh2 Ng4+ (8.146.883.863) 1502
52/90 92:54 +1.45-- 11.Kxh2 Ng4+ (8.377.542.068) 1502
52/90 97:10 +1.56++ 11.Kxh2 (8.772.569.591) 1504
52/90 103:12 +1.30-- 11.Kxh2 Ng4+ (9.313.728.887) 1504
52/90 104:25 +1.53++ 11.Kxh2 (9.420.140.876) 1503
52/90 111:34 +1.53 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (10.065.529.117) 1503
53/93 143:22 +1.42-- 11.Kxh2 Ng4+ (12.948.786.472) 1505
53/93 150:25 +1.31-- 11.Kxh2 Ng4+ (13.568.863.601) 1503
53/93 153:04 +1.42++ 11.Kxh2 (13.808.200.435) 1503
53/93 161:45 +1.45 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (14.570.997.864) 1501
54/78 191:04 +1.56++ 11.Kxh2 (17.249.382.210) 1504
54/94 195:08 +1.34-- 11.Kxh2 Ng4+ (17.605.110.442) 1503
54/94 195:37 +1.50++ 11.Kxh2 (17.648.939.229) 1503
54/94 212:58 +1.64 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (19.213.645.390) 1503
55/85 257:07 +1.53-- 11.Kxh2 Ng4+ (23.138.797.156) 1499
55/85 260:40 +1.42-- 11.Kxh2 Ng4+ (23.454.040.249) 1499
55/85 264:11 +1.53++ 11.Kxh2 (23.760.133.894) 1498
55/85 279:38 +1.54 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (25.156.696.053) 1499
56/80 291:37 +1.44-- 11.Kxh2 Ng4+ (26.192.854.430) 1496
56/82 295:48 +1.33-- 11.Kxh2 Ng4+ (26.556.289.830) 1496
56/82 309:55 +1.44++ 11.Kxh2 (27.826.295.722) 1496
56/90 331:02 +1.47 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (29.723.211.080) 1496
57/90 512:01 +1.37-- 11.Kxh2 Ng4+ (46.093.627.830) 1500
57/90 518:11 +1.47++ 11.Kxh2 (46.651.213.198) 1500
57/90 549:46 +1.63++ 11.Kxh2 (49.548.598.246) 1502
57/99 567:36 +1.44 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (51.169.077.895) 1502
58/91 615:52 +1.54++ 11.Kxh2 (55.659.477.410) 1506
58/91 713:58 +1.65++ 11.Kxh2 (64.687.754.062) 1510
58/91 729:30 +1.58 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (66.080.428.262) 1509
59/102 803:50 +1.47-- 11.Kxh2 Ng4+ (72.772.984.283) 1508
59/102 817:27 +1.58++ 11.Kxh2 (73.992.956.605) 1508
59/108 1040:31+1.74++ 11.Kxh2 (94.286.584.607) 1510
59/108 1085:07+1.37-- 11.Kxh2 Ng4+ (98.289.599.965) 1509
59/108 1092:17+1.66++ 11.Kxh2 (98.931.829.257) 1509
59/108 1108:49+1.50 11.Kxh2 Ng4+ 12.Kg3 Qg5 13.f4 Qh5
14.Bd2 Qh2+ 15.Kf3 Qh4 16.g3 Nh2+
17.Kf2 Ng4+ 18.Ke1 Qh3 19.Nd1 Nh2
20.Rg1 g6 21.f5 Nf3+ 22.Kf2 Nxg1
23.Kxg1 Bxf5 24.Bxf5 (100.370.841.437) 1508
60/99 1187:13+1.39-- 11.Kxh2 Ng4+ (107.323.021.394) 1506
60/99 1202:20+1.50++ 11.Kxh2 (108.564.407.924) 1504
After 19. f5 {!?} also the score for 19...Rxe3 is not so good anymore at very long time, so it could indeed be an improvement over 19. Nd1
[d]rnb1r1k1/pp3ppp/2p5/3p1P2/3P2n1/P1NBP1Pq/1PQBN3/R3KR2 b - -
Engine: Kaissa IV NoContempt (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
44 674:28 +1.48 1...Rxe3 2.Nxd5 Re8 3.Ndf4 Qxg3+
4.Kd1 Nf2+ 5.Rxf2 Qxf2 6.Kc1 Qf1+
7.Qd1 Qxd1+ 8.Kxd1 Nd7 9.Kc2 Nf6
10.Ng3 g6 11.Rh1 Ng4 12.Rg1 a5
13.Ngh5 Ne3+ 14.Kb3 Bxf5 (61.622.918.102) 1522
44 674:28 +1.78 1...Qg2 2.Nf4 Qxg3+ 3.Kd1 Nd7 4.Nce2 Nxe3+
5.Bxe3 Qxe3 6.Qd2 Nf6 7.Qxe3 Rxe3
8.Kd2 Re4 9.Bxe4 Nxe4+ 10.Kc1 Bxf5
11.Nxd5 Bh3 12.Rh1 Bg4 13.Ndc3 Re8
14.Kc2 Ng5 (61.622.918.102) 1522
44 674:28 +1.84 1...Nd7 2.e4 Nh2 3.Rf4 Qg2 4.Qb1 Nf6
5.Kd1 Nh5 6.Rh4 Nxg3 7.Rxh2 Qxh2
8.Nxg3 Qxg3 9.Kc2 dxe4 10.Nxe4 Qh4
11.Qh1 Qxh1 12.Rxh1 Bxf5 13.Nf6+ gxf6
14.Bxf5 Re2 (61.622.918.102) 1522
44 674:28 +2.39 1...Na6 2.Nd1 Qg2 3.Rg1 Qh2 4.Kf1 Qh3+
5.Rg2 Qh1+ 6.Ng1 Nh2+ 7.Rxh2 Qxh2
8.g4 h5 9.g5 c5 10.dxc5 b6 11.cxb6 axb6
12.b4 Bd7 13.Be1 Qxc2 14.Bxc2 Rac8 (61.622.918.102) 1522
44 674:28 +2.70 1...b6 2.e4 Nh2 3.Rg1 Nd7 4.Nf4 Qg4
5.Be2 Nf3+ 6.Kf2 dxe4 7.Nxe4 Nxd4
8.Bxg4 Nxc2 9.Rac1 Rxe4 10.Rxc2 Nf6
11.Bh3 Re5 12.Kg2 Bxf5 13.Bxf5 Rxf5
14.Rxc6 g5 (61.622.918.102) 1522
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47 1377:12+1.68 1...Rxe3 2.Nxd5 Re8 3.Ndf4 Qxg3+
4.Kd1 Nf2+ 5.Rxf2 Qxf2 6.Kc1 Qf1+
7.Qd1 Qxd1+ 8.Kxd1 c5 9.Nd5 Na6
10.Rc1 cxd4 11.b4 Re5 12.Nef4 Kh8
13.b5 Bxf5 14.bxa6 Bg4+ (126.633.595.890) 1532
47 1377:12+1.81 1...Nd7 2.e4 Nh2 3.Rf4 Qg2 4.Qb1 Nf6
5.Kd1 Nh5 6.Rh4 Nxg3 7.Rxh2 Qxh2
8.Nxg3 Qxg3 9.Kc2 dxe4 10.Nxe4 Qh4
11.Qh1 Qxh1 12.Rxh1 Bxf5 13.Nf6+ gxf6
14.Bxf5 Re2 (126.633.595.890) 1532
47 1377:12+1.99 1...Qg2 2.Nf4 Qxg3+ 3.Kd1 Nd7 4.Nce2 Nxe3+
5.Bxe3 Qxe3 6.Qd2 Nf6 7.Qxe3 Rxe3
8.Kd2 Re4 9.Bxe4 Nxe4+ 10.Ke3 Bxf5
11.Nxd5 Re8 12.Rxf5 Nd6+ 13.Re5 Nc4+
14.Kf4 Nxe5 (126.633.595.890) 1532
47 1377:12+2.51 1...b6 2.e4 Nh2 3.Rg1 Nd7 4.Nf4 Qg4
5.Be2 Nf3+ 6.Kf2 dxe4 7.Nxe4 Nxd4
8.Bxg4 Nxc2 9.Rac1 Rxe4 10.Rxc2 Nf6
11.Bh3 Re5 12.Kg2 Ne4 13.Bc1 c5
14.Re1 Bb7 (126.633.595.890) 1532
46 1377:12+2.68 1...Na6 2.Nf4 Qxg3+ 3.Kd1 Qxe3
4.Bxe3 Nxe3+ 5.Kd2 Nxc2 6.Bxc2 Nb8
7.Rh1 Nd7 8.Rag1 Nf6 9.Nce2 Bd7
10.Bd3 Rad8 11.Nh5 Nxh5 12.Rxh5 f6
13.Rgh1 h6 14.R5h3 Kh7 (126.633.595.890) 1532